[osgi.req] Add comment on SCL double-check
[xmvn_resolve] Run in shell
[maven.req] Properly SCL-ize all calls to xmvn-resolve
[mvn_artifact] Attempt to SCL-ize call to xmvn-resolve
Remove trailing comma in JSON config
[xmvn-resolve] Properly execute the command
Revert "[test] Disable some tests for now" -- it's time to address these failures

This reverts commit 47fb218b7007d1aa43fcc812c7f5316a8276a158.
[test] Fix javadoc.req test
Add license headers
[maven.req] Remove unused method
[test] Move test data to correct location
[maven.req] Simplify code for looking up dependencies in POM files
[maven.req] Remove TODO comment
[metadata] Add methods for backward compatibility
[test] Fix tests for metadata
[maven.req] Make it clear that we really want to return None
[javadoc.req] Make it aware of JAVACONFDIRS env. variable
[test] Fix JAVACONFDIRS paths
[test] Add javadoc.req test
[test] Fail